An item costs $390 before tax, and the sales tax is $7.80. Find the sales tax rate. Write your answer as a percentage. İ % X 5 ?

true

step-by-step explanation:

answer: 12

step-by-step explanation:

because yes

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°